I believe these are the answers:) best of luck!
It was developed by scientists throughout history of mankind
Nutrients enter a cell up the concentration gradient by the process of active transport.
I think it’s a, hopefully you get it right!
When an individual is dehydrated, his or her intravenous fluids should be isotonic, because either a hypertonic or hypotonic IV would both cause damage to the individual’s red blood cells. Isotonic solutions are used: to increase the EXTRACELLULAR fluid volume because of blood loss, surgery, dehydration, fluid loss that has been loss extracellularly.